65999317 has 2 divisors, whose sum is σ = 65999318. Its totient is φ = 65999316.

The previous prime is 65999309. The next prime is 65999333. The reversal of 65999317 is 71399956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65060356 + 938961 = 8066^2 + 969^2 .

It is a cyclic number.

It is not a de Polignac number, because 65999317 - 2³ = 65999309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65990317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32999658 + 32999659.

It is an arithmetic number, because the mean of its divisors is an integer number (32999659).

Almost surely, 2^65999317 is an apocalyptic number.

It is an amenable number.

65999317 is a deficient number, since it is larger than the sum of its proper divisors (1).

65999317 is an equidigital number, since it uses as much as digits as its factorization.

65999317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 49.

The square root of 65999317 is about 8123.9963687830. The cubic root of 65999317 is about 404.1226080337.

The spelling of 65999317 in words is "sixty-five million, nine hundred ninety-nine thousand, three hundred seventeen".